Dongqiao, Tibet

Dongqiao is located about 90 kilometres (56 mi) west of Amdo Town.[1] It is located several kilometres to the south of Qiangma and Zigetangcuo Lake, to the northeast of Dongqiacuo lake at an altitude of about 4,657 metres (15,279 ft).[2][3] The Nu River, also known as the Nujiang River flows nearby forming a valley and the Nutiang River also flows nearby.[4][5][6] A small valley is located 7 kilometres (4.3 mi) southeast of Dongqiao.[7] Dongqiao village gives its name to a large region which it is located in which is known geologically for its ophiolite, termed the "Dongqiao ophiolite belt", which is dated to the late Jurassic to early Cretaceous age.[8][9][10] The Jurassic age formations form three distinct geological regions to the north of Lhasa, from north to south the Dongqiao-Nagqu Subregion, the Doilungdeqen-Lhunzhub Subregion and the Sangri Subregion.[11] The northern boundary is known as the Banggong-Dongqiao-Nujiang fault zone or Bangongcuo-Dingqing fault zone, which divides it from the Qiangtang Terrane to the north beyond this.[12][11] Towards the end of the Jurassic period, the ophiolite became covered by chromitite.[4] As Guangcen Li puts it in a 1990 paper, "the ophiolites appear to be covered in turn by a transgressive marine detrital Upper Jurassic to lower most Cretaceous series."[13]

The Chinese Academy of Geological Sciences has conducted studies in the area, identifying "diamond orebodies of diamondiferous ultrabasic rock type in Dongqiao and Lhobsa of Amdo County, northern Tibet."[1] The village of Dongqiao is noted for its hot spring, Jipu.[14]

Due to its geological background, Dongqiao is also a known mining spot, containing the Dongfeng Chrome Mine.[15]